Improved apparatus for insulating telegraph-wires



SAMUEL C. BISHOP AND WILLIAM W. MARKS, yOF -NEl/V YORK, N. Y.

iMPRovED APPARATUS FoniNsULATiNG TELEeeAPH-wiuss.

Specification forming part of Letters Patent N o. 2'9,96, dated July 14, 186:1

To all, whom it may concern:

Beit known that we, SAMUEIf C. BISHOP and WILLIAM W. MARKS, both of the city, county, and State of New York, have invented a new and useful Improvement in Apparatus for Iusulatin g Telegraplrl/Vires, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which-- ligure l represents a longitudinal section ot' an .apparatus or apparatus in part for insulating telegrapli-wires in accordance with lour improvement; Fig. 2, a transverse section taken as indicated by the line x a.' in Fig. 1, the back die being removed. Fig. 3 is a iongitudinal section in part of the same at right angles to Fig. 1 and on a larger scale; and Fig. 4, a transverse section in part, also on a larger scale, through the line a: a' in Fig. i.

Similar letters of reference indicate corresponding parts throughout the several iigures.

In insulating telegraphwires it has been customary'to coat the wire with the. guttapercha or other insulating material while in a plastic state by forcing said material, through the action of n. suitable ram, through a side' orifice in a'die-cylindcr fitted with a back and `front or male and female die, the wirebeing entered through the former and receiving the insulating material round it as it passes on to and through the front die,\through .which latter it is drawn or forced by and along with the insulating material with which it is covered.

vWhere it is but necessary to insulate a single wire there is little or no difficulty in thus accomplishin g the same; but where two or more wires are required to be separately insulated in one and the same core or coating it hasv been found that there is great danger of the wires running or being forced together, so as to establish contact by reason of the presentation of the wires in an irregular manner across the axial line of the orifice, through which the insulating material is forced into the dic-cylinder, and tendency of the material so entering to press ou and bring the wires in contact together. This is a laborious and expensive inode of construction, and our improvement obviates all necessity ot' resorting to it, the

`invention consisting in such a construction and arrangement of parts of thevznpparatus relatively to the feed of insulating material to the diecy1inder thereof', as tlat morethan one wire may be simultaneously coated and insulated hy or within the same core without any risk or tendency on part of the incoming insulating material to bring the wires in contact.

Referringto the accompanying drawings, A is the die-cylinder, surrounded, as usual, by a steam -jacket for keeping the insulating material in the necessary 'soft or plastic state.

B is the back or male, and C the front or fen\ale,'d ieand D D caps for confining the dies.

E is the neck, through which the gutta-percha or other insulating material is forced by the action of the eompressingram into the jdiecylinder, the feed-orifice a, through said neck or side of the cylinder, lying, as usuahat right angles, or thereabout, to the 'axial line of the dies and opposite the one side ofthe male die at or near its inner'tapered end. This male or back die is represented as so constructed at its inner end as that it will admit of two wires;

b c, being passed through it longitudinally at a suitable distance apart to receive the insulat ing material between as well as around them,

which is done'as the wires are passed onto andv through the front die, C.. Y

To prevent/the forcing of the wires b c together or in contact by the action or feed of the incoming insulating material through the orifice wwe arrange the'oriices in the male or back die, B, or so adjust said die as that the Wires bc in passing out from the same will issue or travelina plane which is transverse or at right angles to the line of feed established for the insulating material bythe side orifice, a,

TENT OFFIGE. 1

whereby al1 tendency of the incoming material as it is forced into the die-cylinder to bring the wires b c in contact, is entirely obviated.

What is here claimed, and desired to be secured by Letters Patent, is

The combination of the dies B C, with the feed-orifice a, when the back or male die, B, is perforated for the passage in a separated manner of duplicate wires, and `so arranged relatively to the feed of the insulating material through the orifice a as that the wiresfin their.

passage to and through the front die, C, are

caused to travel in a plane which is transverse or at right angles to the feed-orifice a, substanti ally as and for the purpose herein set forth.

SAM. C. BISHOP. y WILLIAM W. MARKS. Witnesses as to signature of Sam. G. Bishop GHAs. W. WELSH, JOHN L. 'BROWEH Witnesses as to signature of William Marks:

JOHN H. VANDERHOEF, JOHN L. BRoWHrL` 

